Edge trimming and mowing machine



Nov. 10, 1931. J. MILLER 1,831,681

EDGE TRIMMING AND MOWING MACHINE Filed Oct. 19. 1928 2 Sheets-Sheet 1 Jw/l, Mlle):

INVENTOR ATTORNEY Nov. 10, 1931. J. MILLER 1,831,681

EDGE TRIMMING AND MOWING MACHINE Filedoct. 19. 1928 2 Sheets-Shee 2.

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INVENTOR ATTORNEY mama Nov. 10, 1931 UNITED STATES PATENT -OFFICEJOSRPHUS mm, or mursvnmn, xmrrucmr me a m nowme moms a licmn filedOctober 1a, 1928, Serial min-8,542.

motor itself is likewise vertically adjustable, 20

' and in which the cut is continuous regardless of the direction ofmovement of the machine. A further object is to provide a machine inwhich the blade is effective to the extreme sides of the frame and atthe forward portion thereof between the front wheels, so that a closeout may be made at any of the three 1 places referred to.

A further object is to provide a motor for driving the cutting'blade,which rotates on a vertical axis, and to provide a grinding 1 wheel onthe upper end of the vertical armature shaft of the motor, permittingconvenient sharpening ofthe knife or blade, when desired, upon removalfrom its normal position,the vertical adjustment of the motor beingresorted to either for conveniently positioning the grinding wheel withreference to elevation, or for correctly positioning the cutting bladein accordance with the depth of the cut to be made. 7

With the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements described,illustrated and. claimed, it being understood that modifications may bemade Within the scope of the claims without departin from the spirit ofthe invention.

In the drawings forming part of this application,

Figure 1 is a top plan view of the machine. Figure 2 is a view in sideelevation with parts in vertical section.

Figure 3 is a view in front elevation with parts in dotted lines.

Figure 4 is plan view of the cutting blade or knife.

Figure 5 shows a modified cuttin in plan, for use on the lower end of te motor shaft, and Figure 6 is an edge view of one of the elements ofthis cutting device.

' A main frame includes the up 10 and the side elements 11 an device,

12, and a r portion 7 roller 13 is journaled at 14 and 15 in theaforesaid elements 11 and 12, or at the rear of the frame.

Lugs or ears 16 and 17 provide for the mounting of a bail handlecomprising elements 18 and 19 secured by bolts to the handle Handle 20carries devices 21 adapted to accommodate the electric cord 22 by meansof which the motor 23 is to be connected with a source of currentsupply. A plug 24 is adapt, ed for connection with any lamp socket orthe like. A controlling switch is designated 25.

Atthe forward ends of the elements 11 and 12, and on the innerside'thereof, I mount rollers or wheels 27 and 28, and the forwardportion of the element 10 may terminate about the point designated 29,the mounting of the cutting blade referred to below permitting theoperation of said blade, or the end portions thereof, to the limits ofthe frame laterally, and to the 29 between the wheels 27 and 28.

This arrangement permits of close cutting, as previously indicated, onthree sides of the machine, so that strips of grass adjacent to walks,trees and the like,"may be attended to in a much more efieetive'manner,and may in fact befully cut, whereas with many machines in use no suchoperation is possible.

The motor 23 is to be mounted in the annular clamping element 31, and isto be adjustably supported therein by means of a wing nut or the likedesignated 32 and engaging bolt 33 passing through the cars 34 of theclamping device. The armature shaft of the motor is designated 35, andin view of the construction is in a vertical position, and as it mountsthe cutting blade 36 on its lower end, the vertical adjustment of theblade, in varying the depth of the cut, can be effected by the use ofthe clamping device just referred to. Further adjustment to a reasonableextent can be made by means of the nuts shown at 37 and 38 as havingthreaded connection with the end of shaft 35.

Mounted on the upper end of shaft 35 is an point designated abrasivewheel40 a apted for use in sharpen ing the knife 36 when the latter hasbeen removed for the purpose. This grinding wheel is mounted above acollar or sleeve shown at 42, and is adapted to be enclosed when not inuse by a dome-sha ed cover 43 threaded at 44 onto the top of t e motorhousing. In the knife sharpening operation, it will be convenient attimes to vary the elevation of the grinding wheel 40, and this may bedone by adjusting the clamping device at 32 and 33, in the same mannerin which the adjustment of the cut when the machine is in operation, ismade.

A modified cutting device includes circular rotatable blades, appearingin Figures 5 and 6, and desi ated 47, a transverse bar 48 mounting theblades or disks, and being adapted for connection with the lower end ofthe motor shaft, as in the form disclosed in Figure 2.

Having described the invention what is claimed is:

1. In a mowing machine, a frame, a motor including an armature shaftmounted in the frame, a blade mounted on the lower end of the shaft,said shaft being positioned vertically, means for varying the elevationof the blade by changing the elevation of the motor above the ground,and means for independently changing the position of the blade withreference to the shaft.

2. In a mowing machine, a main frame including partly cylindricalportions integral with said frame, a motor including an armature,adjustable means for retaining the part- 1y cylindrical portions invariable clam ing relation with the sides of the motor, a s aft for thearinature, and cutting means carried by the shaft.

In testimony whereof I aflix my signature.

JOSEPHUS MILLER.

